Chemistry Hydrocarbons BUMHS 2024
PMDC Verified Question 10 of 65
Natural gas consist mainly of
A
Butane
B
Propane
C
Methane
D
Ethane
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Methane
Concept:

Natural gas is a naturally occurring hydrocarbon gas mixture found deep underground, often in association with petroleum.

Solution:

  • While natural gas contains various low-molecular-weight alkanes, its primary and overwhelmingly dominant constituent is the simplest alkane: Methane (\( \text{CH}_4 \)).


  • Methane typically makes up 70% to 90% of natural gas by volume.


  • It is highly combustible and is the main energy source provided by municipal gas lines for heating and cooking.


Why other options are incorrect:

  • Ethane, Propane, and Butane are present in natural gas but only as minor components (usually less than 10-15% combined). They are often separated out as Natural Gas Liquids (NGLs).

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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